71 results about "Life cycle costs" patented technology

The invention discloses a transformer substation GIS equipment LCC prediction method based on an improved Attention-LSTM algorithm. The method comprises the following steps: S1, collecting and counting life cycle cost data of transformer substation GIS equipment in operation; s2, establishing a data screening correction model according to the data characteristics of the full-life-cycle cost data of the GIS equipment of the transformer substation, judging abnormal data, and performing data filling; s3, performing dimensionless and uniformization processing on the processed LCC data of the GIS equipment according to types; s4, based on the LSTM algorithm, introducing an Attention algorithm, and constructing an LCC data accurate prediction model based on the improved Attention-LSTM; s5, dividing LCC data predicted by the GIS equipment of the transformer substation into a prediction set and a verification set, and substituting the prediction set to start data prediction; and S6, importing the predicted LCC data into the step S2 to carry out validity evaluation, if a requirement is met, completing prediction, otherwise, carrying out re-prediction. By means of the method, the full-life-cycle cost of the GIS equipment of the transformer substation can be accurately measured and calculated.

The invention discloses a dynamic management method and system for optimizing the full life cycle cost of equipment, and belongs to the technical field of equipment cost management, and the method specifically comprises the steps: collecting equipment operation data in real time, carrying out the preprocessing, generating first collection data, collecting equipment cost data in real time, carrying out the preprocessing, and generating second collection data, and performing evaluation and fault prediction on the health state of the equipment based on the first collection data, and constructing an equipment full life cycle cost model based on the second collection data and the health state evaluation and fault prediction result of the equipment to obtain the operation cost of the equipment in the full life cycle. Dynamically optimizing the life cycle cost of the equipment by using a multi-objective optimization algorithm according to the health condition evaluation and fault prediction result of the equipment and the operation cost of the equipment in the full life cycle; according to the invention, the cost optimization strategy can be dynamically adjusted according to the real-time health condition of the equipment, the fault prediction information and the change of the operation environment.

The invention discloses an AC pavement full-life cost and carbon emission prediction method based on a fatigue curve, and the method comprises the steps: modeling an asphalt pavement structure of a structure A and a structure B, and enabling the structure A and the structure B to be different in surface layer material and surface layer thickness; the structure A adopts a surface layer material with a known PQI exponential decay rule, and the structure B adopts a novel surface layer material to be calculated; respectively carrying out fatigue tests on surface layer materials of the structure A and the structure B to obtain respective fatigue curves; performing PQI-damage curve fitting on the structure A to obtain fitting parameters; modeling through fatigue index migration, predicting a PQI curve of the structure B, and determining a maintenance scheme of the structure B according to the PQI index of the structure B; and calculating the whole life cycle cost and carbon emission of the structure B. According to the method, the repair time interval during the road use period can be quantitatively predicted, so that the whole life cycle cost and carbon emission of the road structure are calculated, and the adaptability evaluation efficiency of the new material pavement structure in the early stage is improved.

The invention discloses a concrete bridge preventive maintenance decision-making method based on degradation prediction, and relates to the technical field of bridge degradation prediction maintenance, and the method comprises the steps: collecting the degradation characteristic data of a concrete bridge through a bridge detection device; according to the method, various types of degradation characteristic data are collected through the bridge detection equipment, the standardized bridge state characteristic vector set is generated, the data-mechanism fusion inversion model is adopted, the actually collected data and the inherent mechanism of bridge degradation are combined, the estimation result is made to better conform to the actual situation, and the estimation accuracy is improved. Dynamic data assimilation is carried out according to a state space model, a probabilistic estimation set of a degradation driving state is input into a predetermined bridge degradation mechanism model for long-term deterministic simulation prediction to generate a plurality of future performance degradation paths, and all the paths form a degradation track cloud picture reflecting prediction uncertainty; the optimal maintenance strategy set can reduce the expected life cycle cost to the maximum extent on the premise that the bridge maintenance requirement is met.

The invention relates to an efficient refrigerating machine room system performance verification and optimization method, which comprises the following steps of: firstly, carrying out annual dynamic load calculation on a building, and establishing load characteristic data; determining a design performance index according to the load characteristic data; verifying the energy efficiency of the design scheme, and calculating the energy consumption and the energy efficiency of the cold source system; then system optimization and design scheme evaluation are carried out, and the optimal scheme of the cold source system is determined through technical economy analysis; and finally, storing feasibility schemes and optimal schemes obtained after iterative calculation of all different optimization measures and data thereof to form a callable database. According to the method, the annual energy efficiency ratio design target value of the efficient machine room cold source system is determined according to factors such as building functions, load characteristics and project positioning, then through target decomposition, cold source equipment model selection and verification of each sub-item index, under the principle that the whole life cycle cost is the lowest, through comparison and selection of different combination schemes, the energy efficiency ratio design target value of the efficient machine room cold source system is obtained. And selecting an optimal design scheme.

The invention discloses a multi-dimensional evaluation method of a blast furnace process extreme energy efficiency technology, and relates to the field of steel production energy efficiency evaluation. Aiming at six extreme energy efficiency technologies of a blast furnace process, a'technical unit energy-saving cost (CCEa)-net present value (NPV)-internal return rate (IRR) 'ternary index system is constructed, an energy-saving supply curve and a cost-benefit analysis method are combined, and comprehensive evaluation is realized through four steps: calculating the energy-saving and emission-reducing potential when the blast furnace uses anthracite, and introducing exclusive emission factor correction; calculating the unit energy-saving cost considering the multi-pollutant synergistic benefit, and combining the exclusive reachable rate of the technology; the full-life-cycle cost effectiveness is analyzed from the perspective of enterprises, and technology maturity correction is introduced; and carrying out dynamic weighted sorting based on a TOPSIS method, and outputting technical priorities. The method breaks through the limitation of single-dimensional evaluation, realizes the collaborative evaluation of economic and environmental benefits, and provides a decision basis for the low-carbon transformation of the blast furnace.

The present application belongs to the technical field of energy storage economic benefit evaluation, and aims to provide support for new energy storage investment strategies for the future form of power grids. Specifically, a whole life cycle cost evaluation method of energy storage technology suitable for multi-dimensional scenarios is provided, which comprehensively evaluates the economy of different energy storage technologies. The method considers multiple life cycle cost factors such as capital expenditure, operating cost, end-of-life cost and charging cost, and combines energy power ratio (E / P), terrain adaptability and different power application scenarios to simulate and quantify the uncertainty of cost parameters using a Monte Carlo prediction model, and predict the future trend of energy storage technology cost. Finally, intuitive evaluation is performed through detailed cost analysis and the constructed superimposed visualization method. The present application provides scientific decision support for power system planning and energy storage technology investment, and has significant practical value and theoretical significance.

The invention relates to an equipment type selection method and system based on full-life-cycle cost portrait system design. The method comprises the following steps: constructing an equipment full-life-cycle portrait label system; according to the equipment full-life-cycle portrait label system, collecting corresponding equipment full-life-cycle cost data and reliability data, and carrying out abnormal value detection and missing value interpolation through a clustering algorithm and an adversarial neural network; according to the equipment reliability label system, constructing an equipment reliability scoring system, and calculating an equipment reliability score; according to the reliability scoring result of the equipment, carrying out portrait classification on the equipment through a fuzzy C-means clustering method according to the whole life cycle portrait system of the equipment; based on portrait classification results, respectively constructing equipment full-life-cycle cost prediction models to obtain equipment full-life-cycle prediction cost; and calculating the comprehensive score of the equipment through a weighted scoring method according to the reliability scoring result of the equipment and the whole life cycle prediction cost of the equipment.

The invention discloses a nuclear production system economic life design method based on mixed integer linear programming, and relates to the technical field of nuclear production system life and economic affordability design. The method comprises the steps of 1, comprehensively constructing a system-component double-layer framework based on engineering structure decomposition and cost, and positively measuring and calculating the whole life cycle cost and the economic life of a nuclear production system; 2, establishing a nuclear production system economic life design MILP model based on cost forward estimation; and 3, outputting a service life design value of the minimum cost of the whole cycle per hour of the corresponding system as the economic service life of the system through the solving model. According to the method, the life cycle cost of the system under different design life schemes can be measured in the design stage in the forward direction, the optimal economic life of the system is determined, a full-cycle economic quantitative tool is provided for the nuclear production system, the life cycle cost per hour is fully reduced, the service life of the system is scientifically decided, and the economic affordability of the system is improved.

The present application proposes a multi-time scale based micro-grid multi-element energy storage collaborative optimization method and system, which takes the lowest life cycle cost as the core optimization target, considers the flexible adjustment ability of hydrogen energy storage system, electrochemical energy storage system and demand response, and constructs a multi-time scale micro-grid multi-element energy storage collaborative optimization configuration model; the first stage and the second stage constraint conditions of the micro-grid multi-element energy storage collaborative optimization configuration model are constructed; the improved column generation algorithm is used to solve the micro-grid multi-element energy storage collaborative optimization configuration model, and the optimal capacity configuration scheme and real-time operation optimization strategy of the micro-grid are obtained. Through multi-time scale modeling and two-stage collaborative optimization solution, the present application quantifies the internal correlation between multi-element energy storage configuration and micro-grid energy balance, significantly reduces the system operation cost, and takes into account the effectiveness and economy of the configuration scheme, thereby providing technical support for stable and efficient operation of the micro-grid.

The application provides a method and system for planning reconstruction and expansion of an airport underpass, and relates to the technical field of airport engineering planning. The method comprises the following steps: generating at least one feasible reconstruction and expansion planning scheme based on the geological conditions of the target underpass and the non-stop construction constraint conditions of the flight area; establishing a three-dimensional finite element model considering the action of the airplane moving load, using the three-dimensional finite element model to verify the structural safety of the scheme, adjusting the relevant parameters and re-verifying the structural safety of the scheme when the scheme fails to pass the verification, and verifying the structural safety of the scheme until the scheme passes the verification; when the number of schemes is at least two, constructing a simulation model, simulating the schemes by using the simulation model, calculating the comprehensive influence degree of the schemes on the airport operation efficiency according to the simulation results, and selecting the scheme with the minimum comprehensive influence degree as the first target feasible reconstruction and expansion planning scheme. The application can improve the comprehensiveness of the planning results, reduce the whole life cycle cost and safety hidden danger of the project, and improve the airport operation efficiency.

The invention relates to the technical field of power distribution network planning, and particularly discloses a power distribution network optical storage collaborative planning method considering delay of power grid upgrading, a double-layer optimization model of outer-layer locating and sizing-inner-layer operation scheduling is constructed, and the outer layer takes the minimum life cycle cost and the controllable risk as targets and is brought into the power grid upgrading to delay the present value income; and an inner layer optimizes a typical sunlight storage operation strategy, adopts a second-order cone programming technology to process power flow constraints, and introduces a conditional value-at-risk to quantify a scene fluctuation risk. According to the method, the whole life cycle cost of the system is reduced, the new energy consumption capability and the planning scheme robustness are improved, and an economical and efficient planning path is provided for the power distribution network under high-proportion new energy access.

The invention discloses a dynamic management method and system for optimizing the full life cycle cost of special equipment, and relates to the technical field of equipment management, and the method comprises the steps: collecting the operation data and environment data of the special equipment, preprocessing the data, and inputting the data into a fault prediction sub-model to predict the fault occurrence probability and fault parts of the special equipment; constructing a fuzzy comprehensive evaluation model to divide risk levels of the special equipment; combining the risk level of the special equipment and the prediction benefit of the benefit prediction sub-model, and making a dynamic maintenance strategy of the special equipment through the maintenance cost; and overhauling the special equipment according to the dynamic overhauling strategy, and optimizing the data model and the dynamic overhauling strategy according to the actual overhauling cost. By predicting the equipment fault occurrence probability, the optimal maintenance time of the equipment is dynamically determined, the maintenance cost and the shutdown loss cost are reduced, the maintenance efficiency is improved, the service life of the equipment is prolonged, and the whole life cycle cost of the equipment is controlled from the source.

The invention discloses an offshore wind power sending scheme selection method and device, terminal equipment and a storage medium, and belongs to the technical field of wind power, and the method comprises the steps: obtaining a plurality of to-be-decided offshore wind power sending schemes of a target offshore wind plant, and carrying out the decision making of each to-be-decided offshore wind power sending scheme; according to the initial investment cost parameter, the operation cost parameter and the scrap cost parameter of each facility in the current offshore wind power delivery scheme to be decided, calculating the whole life cycle cost; and calculating the reliability according to the topological structure of the offshore wind power system, the fault rate of the submarine cable system, and the fault rate and the fault repair time of each component of the converter station subsystem, and taking the scheme with the optimal reliability and full life cycle cost in each offshore wind power delivery scheme to be decided as a selected scheme. By implementing the method, the problems of one-sided selection of an offshore wind power sending scheme and no practicability caused by incomplete cost analysis due to the fact that only the initial investment cost is considered during economic evaluation in the prior art can be solved.

The invention provides a capacity configuration method for a photovoltaic hybrid energy storage system, and belongs to the technical field of power system optimization and energy management automation, and the method comprises the steps: constructing a whole life cycle cost model of the photovoltaic hybrid energy storage system in an engineering cycle and a power loss rate model of a typical day; capacity configuration schemes are initialized, corresponding costs are calculated through a full life cycle cost model for different capacity configuration schemes, and corresponding power loss rates are calculated through a power loss rate model; and carrying out capacity configuration on the photovoltaic hybrid energy storage system by taking the capacity configuration scheme with the lowest cost and the power loss rate meeting the requirement of the power loss rate range of the region to be configured as a target capacity configuration scheme. According to the method, the power supply reliability of the photovoltaic hybrid energy storage system can be improved under the condition that the economic performance requirement is met.

The invention discloses a method for selecting redundant configuration of offshore wind power main transformer and cross section of submarine cable, comprising obtaining initial data of offshore wind farm; performing LCC calculation of main transformer of offshore booster station according to the initial data, obtaining redundant configuration of main transformer and redundancy of main transformer; performing LCC calculation of sending submarine cable according to the redundancy of main transformer, obtaining cross section selection of submarine cable with optimal life cycle cost; judging whether cross section selection of submarine cable matches redundancy of main transformer, if not, performing correction step, if matching, performing output step; first obtaining cross section selection of different submarine cables and calculation results of current carrying capacity thereof according to initial data, and then calculating LCC calculation result matching redundant configuration of main transformer; outputting optimal redundant configuration of transformer and cross section selection of submarine cable, the invention can establish dynamic model of full life cycle cost of main transformer and sending submarine cable of offshore booster station, so as to achieve the effect of screening redundant configuration of main transformer and cross section of submarine cable.

The invention relates to a planning and optimal configuration method for an active traction network energy system, and the method achieves the construction of a universal planning and optimal configuration method through three typical scenes, and carries out the planning and configuration of a new energy and energy storage system in a traction network in consideration of the operation cost and a full-life-cycle net present value. Therefore, it is guaranteed that the railway system has economic feasibility, carbon reduction of the railway system is guaranteed, and meanwhile energy self-consistency is achieved to the maximum extent. According to the method, a double-layer optimization model is adopted for capacity configuration optimization, an upper-layer optimization model adopts an intelligent algorithm to perform capacity planning on a renewable energy system and an energy storage system so as to achieve the lowest net present value cost in the whole life cycle, and a lower-layer optimization model calculates the operation cost through a solver so as to achieve the purpose of reducing the operation cost of operation and maintenance, electricity purchasing, electricity selling and the like. The upper layer and the lower layer depend on each other, the whole life cycle cost and the real-time operation efficiency are both considered, and the scientificity and operability of energy system planning are improved.

The present application proposes a new energy storage system capacity configuration method based on full life cycle cost optimization, relates to the technical field of energy storage capacity configuration optimization, and establishes an annualized net income objective function by respectively constructing an annualized investment cost model, an annualized operation and maintenance cost model and an annualized total income model related to the capacity configuration of the energy storage system. Based on the minimum energy capacity constraint, the actual operation efficiency constraint and the annual throughput energy constraint required to meet the fluctuation suppression of new energy output of the energy storage system, the annualized net income objective function is converted to obtain the converted annualized net income objective function; based on the converted annualized net income objective function, the unit capacity annual net income function is obtained, and the energy storage capacity configuration is carried out based on the unit capacity annual net income objective function to obtain the optimal capacity configuration result. The present application fully considers the implicit influence of the full life cycle of energy storage, improves the scientificity and reliability of energy storage capacity configuration, and further improves the construction quality of new energy.

The application discloses a phase change material-operation parameter integrated intelligent optimization method for low-carbon buildings, which jointly determines phase change material parameters and operation strategies under multiple meteorological scenes, optimizes and stabilizes the thermal performance of a building envelope, simultaneously considers annual energy consumption, peak load, unsatisfied hours, annual carbon emission and life cycle cost (LCC), and outputs an interpretable parameter interval and an engineering operation rule. The application realizes material-operation collaborative decision, cross-climate small sample fast generalization and interpretable recommendation, significantly reduces trial and error cost, and improves the comprehensive performance and reliability of energy efficiency, comfort and carbon emission reduction.

An artificial intelligence-based document and life cycle cost analysis method for solar energy contracts. This method includes two main modules, the AI-based document analysis module and the life cycle costs analysis module. The AI-based document analysis module uses natural language processing (NLP) and a generative pre-trained transformer (GPT) to summarize the key insights and deficiencies of a solar energy proposal or contract and extract the necessary input data for a life cycle cost analysis. The life cycle cost analysis module accepts the input data from the AI-based document analysis module, acquires additional data from other sources like the internet and runs the life cycle cost analysis for the solar energy proposal or contract. The entire process is automated to minimize human error and maintain high industry standards from start to finish. This ensures that the results are both professional and comprehensible for the average property owner.

The application discloses a multi-modal logistics capacity dynamic scheduling method and device for large-scale extraterrestrial facility construction and a storage medium, the method aims at the problems of high single rocket transportation cost and long single space elevator construction period, constructs a whole life cycle cost coupling model integrating a cumulative transportation quantity learning curve and a technology maturity evolution law, adopts a discrete global traversal algorithm to perform multi-dimensional weighted optimization on a construction period and a system total cost in a feasible time domain, determines a global optimal time threshold of capacity mode switching, and introduces a physical disturbance model to correct the robustness of a scheduling scheme. The system automatically generates phased dynamic scheduling instructions based on the optimal time threshold, assigns high-frequency rockets to fill the capacity gap in the early construction period, and switches to a space elevator dominant transportation in the operation period. Through the peak-shaving complementary mechanism of heterogeneous capacity, the application solves the multi-objective conflict of transportation cost and engineering period, and realizes the automatic planning and optimization of the logistics scheme of extraterrestrial infrastructure construction.

The application discloses a highway expansion mode decision method based on a whole life cycle cost benefit, and comprises the following steps: S1, highway expansion period construction cost is estimated; S2, highway expansion period construction carbon emission cost is estimated; S3, highway expansion period operation benefit loss is estimated; S4, highway operation period operation benefit is estimated; S5, highway expansion operation period operation cost is estimated; S6, highway expansion period and operation period vehicle operation carbon emission cost are estimated; S7, based on whole life cycle cost benefit analysis, the expansion scheme is decided.The application considers the construction and operation period carbon emission cost and the expansion period operation benefit loss, so that the whole life cycle cost benefit system of the highway expansion project is more perfect.Facing different expansion modes, the method can be used to complete the total cost benefit analysis of the construction period and the operation period, and the generality of the decision method is improved.

The invention discloses a method and a system for evaluating the life cycle cost of a subway freight system under passenger and freight collaboration. The method comprises the following steps: constructing a life cycle cost model of the subway freight system under passenger and freight collaboration, wherein the life cycle cost model comprises four stages of decision design, construction, operation maintenance and scrap recovery; determining a key cost factor influencing the cost of each stage of the subway freight system under the whole life cycle cost model, and constructing a whole life cycle cost factor relation model of the subway freight system under passenger and freight cooperation based on each cost factor influence factor; and based on the whole-life-cycle cost motivation relationship model and the passenger and freight income of the subway freight system under passenger and freight collaboration, predicting and evaluating the minimization of the whole-life-cycle cost or the maximization of the benefit of the subway freight system under passenger and freight collaboration. By constructing a cost calculation framework and model, key cost causes are identified and quantified, and accurate evaluation and effective management of the M-ULS cost are realized.

The invention provides a design method for reducing the whole life cycle cost of electronic hardware equipment, which relates to the field of electronic equipment management and comprises the following steps: S1, importing a component list of an initial design scheme; s2, determining an alternative replacement component for each component in the list, and forming a component alternative replacement mapping table; s3, constructing an alternative design scheme set based on the mapping table; s4, reliability evaluation is carried out on each alternative design scheme in the scheme set, and the severity level fault rate and the total product fault rate of each scheme are obtained; s5, calculating the whole life cycle cost of each scheme based on a reliability evaluation result; and S6, comparing the whole life cycle cost of all the alternative design schemes, and selecting the scheme with the optimal cost as the final design scheme. According to the method, the product life cycle cost formed by the manufacturing cost, the maintenance cost and the fault influence cost is reduced in the design stage of the electronic equipment, and comprehensive optimization of the economical efficiency and the reliability of the electronic equipment is achieved.

A power distribution network reliability cost-benefit analysis method based on life cycle cost is characterized in that a reliability cost improvement model is constructed with optimal configuration of distributed resources of a power distribution network as a target, and the reliability cost improvement model is a distributed resource reliability cost-benefit oriented double-layer optimization configuration model. The reliability of the distributed resources is accurately predicted and evaluated, so that the cost and income of investment in each stage of planning, construction, operation, decommissioning and the like are systematically considered, and unnecessary cost waste is reduced. The method can achieve the balance of two time scales through the iterative coupling of the planning layer and the operation layer, obtains the final global optimal solution, effectively improves the reliability cost-benefit analysis effect, can obtain the reliability investment comprehensive benefit through employing a proper method according to different power distribution network scales, and improves the reliability cost-benefit analysis efficiency. And the application range of the design is effectively expanded.

The invention discloses a self-resetting bridge pier structure with high lateral bearing capacity resistance and a design method thereof, and relates to the field of seismic resistance. The structure comprises a bearing platform, a structural assembly of an upper and lower assembly section of a pier body, a prestressed assembly of an unbonded prestressed tendon and an anchorage device, a buckling-restrained brace damper with a connecting piece, and contact assemblies such as a contact steel plate and a shear key, and an assembly seam is moved upwards to the lower part of the pier body. The design method comprises the step of calculating the yield bending moment of the assembly interface, the height of the assembly seam and the reinforcing height. By optimizing the position of an assembly seam, shortening a lateral force arm and combining the synergistic effect of multiple heavy assemblies, on the premise that structural damage is not increased, the lateral bearing capacity of the self-resetting pier meets the design requirement of a ductile pier, the self-resetting performance is stable, the residual displacement angle is smaller than 0.5%, low damage and high energy consumption are achieved, the whole life cycle cost is reduced, and traffic safety is guaranteed.

A cover assembly generally includes a lock channel, flush mounted panels, a fastener, and a nut. Advantageously, the cover and cover systems are corrosion resistant and / or high strength, comprised of removable panels, offer easy installation and access, may be high strength fiber reinforced plastic, offer life cycle cost savings, may be compression sealed, have long relatively maintenance-free life, and / or are customizable.

The invention discloses a peak regulation type energy storage equivalent capacity conversion method and system considering economic cost constraints. The method comprises the following steps: acquiring energy storage and actual operation data of a power grid, and extracting operation parameters of various indexes; determining a reference energy storage system, recording the reference energy storage system as I type, determining various technical parameters of the reference energy storage system, and calculating the whole life cycle total discharge capacity and the whole life cycle cost of the reference energy storage system; solving the to-be-assessed type of stored energy recorded as type II, the required initial configuration capacity and the full life cycle cost thereof by taking the equal total discharge capacity as a target, and recording the to-be-assessed type of stored energy as type II; and S3, judging whether a constraint condition is met or not, and if not, returning to the step S3. According to the method, a double-objective optimization model with technical performance and full-life-cycle economy collaboration is constructed, a multi-type energy storage equivalent peak regulation capacity configuration scheme meeting the technical performance requirement and the economy requirement at the same time is output, and a quantitative and reliable decision basis is provided for energy storage economic operation in a peak regulation scene.

The application discloses a full-life-cycle energy storage-power generation system economic scheduling method, establishes a comprehensive power generation system and energy storage system coupling decision model, that is, a full-life-cycle energy storage-power generation system economic scheduling model, and performs collaborative scheduling through scheduling constraints of thermal power generating units, renewable energy power generating units and the energy storage system in the power generation system and the operation efficiency of the life cycle cost optimization power system, so that the economy and sustainability of the power system are improved.

To create a long-term facility update plan in consideration of a plurality of options such as replacement and repair of power facilities.SOLUTION: According to an aspect of the present disclosure, there is provided a risk transition calculation device including a first risk transition calculation unit configured to calculate a risk transition of each power facility based on failure impact information and failure probability information, a risk reduction width calculation unit configured to calculate a first risk reduction width at the time of replacement of each power facility and a second risk reduction width at the time of one or a plurality of repairs to be performed until replacement of each power facility, and a cost calculation unit configured to calculate a first life cycle cost until each power facility is replaced without being repaired and a second life cycle cost until each power facility is repaired and replaced. A power facility management system includes a determination unit that determines replacement / repair plan information indicating replacement or repair of each power facility on the basis of a lower one of a first life cycle cost and a second life cycle cost, and a plan creation unit that creates a facility replacement plan on the basis of the replacement / repair plan information of each power facility.SELECTED DRAWING: Figure 17